JPH0345780A - Chemical finish of silk fiber product - Google Patents

Abstract

PURPOSE:To readily impart excellent dimensional stability and wear resistance without deterioration of silk product by adhering treating solution containing polyfunctional epoxy compound and metal salt as catalyst and treating by hot steam. CONSTITUTION:An aqueous solution composed of polyfunctional epoxy compound such as polyglycidyl ether of polyhydric alcohol, as a preferable example and neutral or weak alkaline metal salt as a catalyst is applied to silk fiber product and the cloth is subjected to hot steam treatment without drying, then said compound is reacted with and tightly adhered to the silk fiber to efficiently and uniformly impart excellent wear resistance and dimensional stability, etc., to the cloth in a short time. As said metal salt, neutral salt such as Na, K, Li and weak alkaline salt such as thiosulfate or thiocyanate, are exemplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for chemically modifying silk fiber products using an epoxy compound.

(Prior art) As a method for modifying silk fiber products using epoxy compounds, strong alkaline substances such as caustic alkali, or tetrachloride,
Strong acids such as borosilicate trifluoride! A method using IJ quality as a catalyst is known, but this processing method is accompanied by deterioration of the fibers. There is also a method (Japanese Patent Publication No. 38-25198) in which an organic amine is used as a mild catalyst, but this method does not provide sufficient processing effects.

Therefore, as an improvement method for these, an organic solvent-based processing method called the two-phase method (Japanese Patent Publication No. 52-38131) has emerged, but this method involves impregnating the fibers with an aqueous catalyst solution in the first step, and then impregnating the fibers in the second step. This method involves reacting an epoxy compound as an organic solvent phase at high temperatures, resulting in poor workability and many drawbacks that hinder its practical application.

A method of proceeding with the reaction in the aqueous phase has been proposed as a method to improve this problem, but the epoxy compounds used for this are water-soluble monofunctional epoxy compounds and diglycidyl ethers of polyhydric alcohols, and the epoxy compounds used for this are water-soluble monofunctional epoxy compounds and diglycidyl ethers of polyhydric alcohols, and the epoxy compounds used for this method are water-soluble monofunctional epoxy compounds and diglycidyl ethers of polyhydric alcohols. The epoxy compound is allowed to coexist with the treatment bath and undergoes a high-temperature reaction, and this method has the disadvantage that the epoxy compound progresses to become a resin within the solution, and the compound does not react efficiently with the fibers.

Furthermore, there is also known a method of coating or spraying an organic solvent/water mixture or water dispersion of an epoxy compound onto a textile product and irradiating it with microwaves (Japanese Patent Laid-Open No. 6O-252771).
This method also requires pretreatment with an aqueous catalyst solution in the first stage, and has drawbacks such as inefficiency since the treatment spans two stages, and difficulty in uniformly performing the treatment.

In order to overcome these drawbacks of the conventional method and to be able to carry out the treatment simply and with existing equipment, the applicant has developed a one-stage treatment method using a cold batch method and has filed a patent application (Japanese Patent Application Laid-Open No. No. 64-20379 and JP-A No. 64-203
No. 80), however, this method required a reaction time of 8 to 48 hours and had a problem in working efficiency.

(Problems to be Solved by the Invention) An object of the present invention is to provide a method for efficiently imparting wear resistance, dimensional stability, etc. to silk fiber products by uniformly reacting an epoxy compound in a short time. do.

(Means for Solving the Problems) The present invention solves the above problems by applying an aqueous treatment liquid that combines a polyfunctional epoxy compound and a metal salt catalyst to a silk fiber product, and then subjecting it to a steam treatment without drying. Settled.

That is, the present invention utilizes steaming treatment for reaction fixation after adhering an aqueous treatment solution of an epoxy compound containing a catalyst to silk fibers, which avoids wasteful reactions like conventional reactions in solution. 100% epoxy compound without any
Can effectively react and fix nearby areas. Furthermore, the attachment of the treatment layer can be carried out efficiently in a single step, and quality control is easy.

Suitable polyfunctional epoxy compounds used in the present invention include polyglycidyl ethers of polyhydric alcohols, such as ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, and polypropylene glycol diglycidyl ether. These include glycidyl ether, glycerol diglycidyl ether, sorbitol polyglycidyl ether, and reduced maltose polyglycidyl ether. In addition, dicarboxylic acid diglycidyl esters, such as diglycidyl ethers of succinic acid and adipine, and nitrogen-containing heterocyclic epoxy compounds can also be effectively used. These may be used alone or in combination of two or more.

Next, as a catalyst, for example, Nas K SL1% Ca
, neutral salts and weak alkaline salts containing Ba as a cationic component are used, specifically thiosulfates, thiocyanates, chlorides, iodides, bromides, carbonates, phosphates, acetates, etc. Useful. These catalysts are 20% of epoxy compounds.
It is desirable to use it within the range of 100% by weight.

The treatment liquid used in the present invention is basically one in which an epoxy compound and a metal salt catalyst are combined in water. It contains small amounts of agents, etc. The nighttime condition depends on the type and amount of adjuvant used.
It takes the form of either an aqueous solution or an aqueous emulsion.

In order to apply the above-mentioned treatment liquid to silk fabrics or knitted fabrics, it is usually necessary to
It is preferable to use a padding machine equipped with ~3 squeezing rolls, and adjust the amount of treatment liquid applied to the fibers to be treated within a range of 50 to 200% by weight.

When treating other textile products, such as threads, it is preferable to impregnate them with a treatment liquid and remove the liquid using a centrifuge or the like.

In the present invention, a textile product filled with a treatment liquid is heated while retaining moisture, and is steam-treated without drying.

This process is known as the pad steam method in the field of ordinary textile processing, and can be adequately handled with existing equipment. Therefore, practical application of the present invention becomes extremely easy.

The aeration process is usually carried out using a 90 to 10
This can be accomplished by placing the treated product in a room at 0° C. for 2 to 60 minutes. If a normal pressure steamer is used, steaming for 15 to 30 minutes is sufficient. It is rather undesirable to use superheated fumes, which evaporates water from the treated product.

Note that irradiation with microwaves during IP is effective in shortening the steaming time, and fixation of the epoxy compound can be completed with a high degree of efficiency by steaming for a very short time of 2 to 5 minutes.

In the present invention, by adopting such a steaming treatment, an epoxy compound can be reacted and fixed to silk fiber products uniformly and efficiently in a short time. Together, this significantly increases productivity and makes it possible to stably produce products of uniform quality without the need for processing teams.

Note that in the present invention, the term "silk fiber product" refers to a product containing silk fibers, and includes knitted and woven fabrics made solely of silk fibers,
It includes not only threads but also blends of silk mm and other fibers, interwoven or interwoven fabrics.

Hereinafter, this will be explained in detail using examples.

Example 1 T# Kneaded Silk Ronshi Chirimen (14 stitches) 33.9g
r was immersed in the following aqueous treatment solution, and then drained with a mangle (squeezing ratio 120%) Isopropatol 120 Sodium thiocyanate 80 Water
700 This treated cloth was steamed without drying by placing it in a 98° C. steaming chamber filled with saturated steam for 20 minutes, followed by soaping, washing, and drying to obtain a treated cloth weighing 37.8 gr. In this case, the processing weight increase rate was 10.3% and the reaction rate was as high as 96%.

However, increase rate = (increment/pre-treatment fabric type 1) X100 efficiency - (
Increment/adhered resin content) x 100 increment - weight increase (pressure) of the cloth before and after treatment The adhered resin content is the weight of the epoxy compound contained in the liquid picked up by the treated cloth.

The performance of this treated fabric is shown in Table 1.

Table 1 (Note) Moisture absorption = 20℃, 65%H, 24Hr! jilrW wrinkle resistance; JIS Li2O2 wire method collection lit: JI
SL1042 [1 method thread: JIS Gakushin type friction tester, 500. Sensory test using load, rubbing nylon cloth 200 times, and visual observation Example 2 After immersing 34.1g of the same silk material as in Example 1 in the following aqueous treatment solution, the wear was lifted up by 120%.
The mangle was dehydrated.

Nonionic surfactant 15 Sodium thiocyanate 80 Water 05 This treated cloth was steamed in the same manner as in Example 1, and after-treatment and drying, the final cloth ff1l had a weight of 38.1 gr.

At this time, the increase rate was 11.7% and the efficiency was 98%. Table 2 shows the performance of this treated fabric in terms of washing shrinkage rate.

Table 2 Example 3 3.41 gr of the same silk fabric as in Example 2 was immersed in a liquid with the same formulation as in Example 1, and demangled '/& (squeezing rate 120%).
), this product can be used in a home microwave oven (high frequency output 5
00W), water vapor was introduced, and heating was performed for 3 minutes. At this time, the increase rate was 13.2%, and the efficiency exceeded 100 and reached 110% due to the apparent calculation.

(Effects of the Invention) In the method of the present invention, an epoxy compound is produced by applying the chemical solution required in the step to a silk fiber product and subsequently heating the product with N using existing equipment without using any special equipment. It can be stably reacted and fixed to silk fibers. Therefore, it is possible to obtain a treated cloth with very high productivity and good uniformity.

Furthermore, the product obtained by the method of the present invention has good dimensional stability and excellent abrasion resistance, and will contribute to the production of silk fiber products that can be washed at home.

Claims (1)

[Claims] An aqueous treatment solution that combines a polyfunctional epoxy compound and a neutral or weakly alkaline metal salt as a catalyst is applied to a silk fiber product, and then steamed without drying to fix the epoxy compound to the silk fiber. A method for chemically processing silk fiber products.